package com.example.questionnaire.mbg.service;

import com.example.questionnaire.mbg.entity.User;

public interface IUserService {


    User selectUserByUsername(String username);

    void register(String username, String password);

    void changeUserPassword(String username, String new_password);

    void logout(String username);

    void login(String username);

    boolean existsUser(int uid);

    User selectUserByID(int uid);
}